Speed 2 Undercurrent; Speed 2 Acceleration - GE 469 Instruction Manual

4.15 S14 TWO-SPEED MOTOR
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PATH: SETPOINTS S14 TWO-SPEED MOTOR
n SPEED2 U/C
n [ENTER] for more
4
The addition of a second Undercurrent trip or alarm level may be useful as it will indicate if the wrong setpoints are being
used for the wrong speed i.e. normal running current for Speed 2 may be undercurrent for Speed 1.
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PATH: SETPOINTS S14 TWO-SPEED MOTOR
n SPEED2 ACCEL.
n [ENTER] for more
Two additional acceleration timers are provided for the two speed motor feature. One timer is for a start in Speed 2 from a
stopped condition. The other is an acceleration timer for the transition from Speed 1 to Speed 2. Also, while the motor is
running, the 469 will ignore Mechanical Jam protection during the acceleration from Speed 1 to Speed 2 until the motor cur-
rent has dropped below Speed 2 FLA × Overload Pickup value, or the Speed 1-2 acceleration time has expired. At that
point in time, the Mechanical Jam feature will be enabled with the Speed 2 FLA
4-84
Courtesy of NationalSwitchgear.com
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SPEED2 U/C
ð
BLOCK SPEED2 U/C
ENTER
ESCAPE FROM START: 0 s
SPEED2 U/C ALARM:
ESCAPE
Off
MESSAGE
SPEED2 U/C ALARM
ESCAPE
PICKUP: 0.70 x FLA
MESSAGE
SPEED2 U/C ALARM
ESCAPE
DELAY: 1 s
MESSAGE
SPEED2 U/C ALARM
ESCAPE
EVENTS: Off
MESSAGE
SPEED2 U/C
ESCAPE
MESSAGE TRIP: 0ff
SPEED2 U/C TRIP
ESCAPE
PICKUP: 0.70 x FLA
MESSAGE
SPEED2 U/C TRIP
ESCAPE
DELAY: 1 s
MESSAGE
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SPEED2 ACCEL.
ð
SPEED2 ACCEL. TIMER
ENTER
ESCAPE FROM START: 10.0 s
ACCEL. TIMER FROM
ESCAPE
SPEED1-2: 10.0 s
MESSAGE
SPEED SWITCH TRIP
ESCAPE
SPEED2 DELAY: 5.0 s
MESSAGE
SPEED2 RATED SPEED:
ESCAPE
3600 RPM
MESSAGE
469 Motor Management Relay

4.15.3 SPEED 2 UNDERCURRENT

Range: 0 to 15000 s in steps of 1
Range: Off, Latched, Unlatched
Range: 0.10 to 0.95 x FLA in steps of 0.01
Range: 1 to 60 s in steps of 1
Range: On, Off
Range: Off, Latched, Unlatched
Range: 0.10 to 0.99 x FLA in steps of 0.01
Range: 1 to 60 s in steps of 1

4.15.4 SPEED 2 ACCELERATION

Range: 1.0 to 250.0 s in steps of 0.1
Range: 1.0 to 250.0 s in steps of 0.1
Range: 1.0 to 250.0 s in steps of 0.1. Seen only if one of
the digital inputs is assigned as Speed Switch
Range: 100 to 7200 RPM in steps of 0.1. Seen only if
one of the digital inputs is assigned as
Tachometer.
4 SETPOINTS
GE Multilin